// © Broadcom. All Rights Reserved.
// The term “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
// SPDX-License-Identifier: Apache-2.0

package types

import (
	"bytes"
	"encoding/json"
	"fmt"
	"net/url"
	"reflect"
	"strings"
	"time"
)

func EnumValuesAsStrings[T ~string](enumValues []T) []string {
	stringValues := make([]string, len(enumValues))
	for i := range enumValues {
		stringValues[i] = string(enumValues[i])
	}
	return stringValues
}

func New[T any](t T) *T {
	return &t
}

func NewBool(v bool) *bool {
	return &v
}

func NewInt32(v int32) *int32 {
	return &v
}

func NewInt64(v int64) *int64 {
	return &v
}

func NewTime(v time.Time) *time.Time {
	return &v
}

func NewReference(r ManagedObjectReference) *ManagedObjectReference {
	return &r
}

func (r ManagedObjectReference) Reference() ManagedObjectReference {
	return r
}

func (r ManagedObjectReference) String() string {
	return strings.Join([]string{r.Type, r.Value}, ":")
}

func (r *ManagedObjectReference) FromString(o string) bool {
	s := strings.SplitN(o, ":", 2)

	if len(s) != 2 {
		return false
	}

	r.Type = s[0]
	r.Value = s[1]

	return true
}

// Encode ManagedObjectReference for use with URL and File paths
func (r ManagedObjectReference) Encode() string {
	return strings.Join([]string{r.Type, url.QueryEscape(r.Value)}, "-")
}

func (c *PerfCounterInfo) Name() string {
	return c.GroupInfo.GetElementDescription().Key + "." + c.NameInfo.GetElementDescription().Key + "." + string(c.RollupType)
}

func defaultResourceAllocationInfo() ResourceAllocationInfo {
	return ResourceAllocationInfo{
		Reservation:           NewInt64(0),
		ExpandableReservation: NewBool(true),
		Limit:                 NewInt64(-1),
		Shares: &SharesInfo{
			Level: SharesLevelNormal,
		},
	}
}

// DefaultResourceConfigSpec returns a ResourceConfigSpec populated with the same default field values as vCenter.
// Note that the wsdl marks these fields as optional, but they are required to be set when creating a resource pool.
// They are only optional when updating a resource pool.
func DefaultResourceConfigSpec() ResourceConfigSpec {
	return ResourceConfigSpec{
		CpuAllocation:    defaultResourceAllocationInfo(),
		MemoryAllocation: defaultResourceAllocationInfo(),
	}
}

// ToConfigSpec returns a VirtualMachineConfigSpec based on the
// VirtualMachineConfigInfo.
func (ci VirtualMachineConfigInfo) ToConfigSpec() VirtualMachineConfigSpec {
	cs := VirtualMachineConfigSpec{
		ChangeVersion:                ci.ChangeVersion,
		Name:                         ci.Name,
		Version:                      ci.Version,
		CreateDate:                   ci.CreateDate,
		Uuid:                         ci.Uuid,
		InstanceUuid:                 ci.InstanceUuid,
		NpivNodeWorldWideName:        ci.NpivNodeWorldWideName,
		NpivPortWorldWideName:        ci.NpivPortWorldWideName,
		NpivWorldWideNameType:        ci.NpivWorldWideNameType,
		NpivDesiredNodeWwns:          ci.NpivDesiredNodeWwns,
		NpivDesiredPortWwns:          ci.NpivDesiredPortWwns,
		NpivTemporaryDisabled:        ci.NpivTemporaryDisabled,
		NpivOnNonRdmDisks:            ci.NpivOnNonRdmDisks,
		LocationId:                   ci.LocationId,
		GuestId:                      ci.GuestId,
		AlternateGuestName:           ci.AlternateGuestName,
		Annotation:                   ci.Annotation,
		Files:                        &ci.Files,
		Tools:                        ci.Tools,
		Flags:                        &ci.Flags,
		ConsolePreferences:           ci.ConsolePreferences,
		PowerOpInfo:                  &ci.DefaultPowerOps,
		RebootPowerOff:               ci.RebootPowerOff,
		NumCPUs:                      ci.Hardware.NumCPU,
		VcpuConfig:                   ci.VcpuConfig,
		NumCoresPerSocket:            ci.Hardware.NumCoresPerSocket,
		MemoryMB:                     int64(ci.Hardware.MemoryMB),
		MemoryHotAddEnabled:          ci.MemoryHotAddEnabled,
		CpuHotAddEnabled:             ci.CpuHotAddEnabled,
		CpuHotRemoveEnabled:          ci.CpuHotRemoveEnabled,
		VirtualICH7MPresent:          ci.Hardware.VirtualICH7MPresent,
		VirtualSMCPresent:            ci.Hardware.VirtualSMCPresent,
		DeviceChange:                 nil, // See below
		CpuAllocation:                ci.CpuAllocation,
		MemoryAllocation:             ci.MemoryAllocation,
		LatencySensitivity:           ci.LatencySensitivity,
		CpuAffinity:                  ci.CpuAffinity,
		MemoryAffinity:               ci.MemoryAffinity,
		NetworkShaper:                ci.NetworkShaper,
		CpuFeatureMask:               nil, // See below
		ExtraConfig:                  ci.ExtraConfig,
		SwapPlacement:                ci.SwapPlacement,
		BootOptions:                  ci.BootOptions,
		FtInfo:                       ci.FtInfo,
		RepConfig:                    ci.RepConfig,
		VAssertsEnabled:              ci.VAssertsEnabled,
		ChangeTrackingEnabled:        ci.ChangeTrackingEnabled,
		Firmware:                     ci.Firmware,
		MaxMksConnections:            ci.MaxMksConnections,
		GuestAutoLockEnabled:         ci.GuestAutoLockEnabled,
		ManagedBy:                    ci.ManagedBy,
		MemoryReservationLockedToMax: ci.MemoryReservationLockedToMax,
		NestedHVEnabled:              ci.NestedHVEnabled,
		VPMCEnabled:                  ci.VPMCEnabled,
		MessageBusTunnelEnabled:      ci.MessageBusTunnelEnabled,
		MigrateEncryption:            ci.MigrateEncryption,
		FtEncryptionMode:             ci.FtEncryptionMode,
		SevEnabled:                   ci.SevEnabled,
		MotherboardLayout:            ci.Hardware.MotherboardLayout,
		ScheduledHardwareUpgradeInfo: ci.ScheduledHardwareUpgradeInfo,
		SgxInfo:                      ci.SgxInfo,
		GuestMonitoringModeInfo:      ci.GuestMonitoringModeInfo,
		PmemFailoverEnabled:          ci.PmemFailoverEnabled,
		VmxStatsCollectionEnabled:    ci.VmxStatsCollectionEnabled,
		VmOpNotificationToAppEnabled: ci.VmOpNotificationToAppEnabled,
		VmOpNotificationTimeout:      ci.VmOpNotificationTimeout,
		DeviceSwap:                   ci.DeviceSwap,
		SimultaneousThreads:          ci.Hardware.SimultaneousThreads,
		Pmem:                         ci.Pmem,
		DeviceGroups:                 ci.DeviceGroups,
		FixedPassthruHotPlugEnabled:  ci.FixedPassthruHotPlugEnabled,
		MetroFtEnabled:               ci.MetroFtEnabled,
		MetroFtHostGroup:             ci.MetroFtHostGroup,
	}

	// Unassign the Files field if all of its fields are empty.
	if ci.Files.FtMetadataDirectory == "" && ci.Files.LogDirectory == "" &&
		ci.Files.SnapshotDirectory == "" && ci.Files.SuspendDirectory == "" &&
		ci.Files.VmPathName == "" {
		cs.Files = nil
	}

	// Unassign the Flags field if all of its fields are empty.
	if ci.Flags.CbrcCacheEnabled == nil &&
		ci.Flags.DisableAcceleration == nil &&
		ci.Flags.DiskUuidEnabled == nil &&
		ci.Flags.EnableLogging == nil &&
		ci.Flags.FaultToleranceType == "" &&
		ci.Flags.HtSharing == "" &&
		ci.Flags.MonitorType == "" &&
		ci.Flags.RecordReplayEnabled == nil &&
		ci.Flags.RunWithDebugInfo == nil &&
		ci.Flags.SnapshotDisabled == nil &&
		ci.Flags.SnapshotLocked == nil &&
		ci.Flags.SnapshotPowerOffBehavior == "" &&
		ci.Flags.UseToe == nil &&
		ci.Flags.VbsEnabled == nil &&
		ci.Flags.VirtualExecUsage == "" &&
		ci.Flags.VirtualMmuUsage == "" &&
		ci.Flags.VvtdEnabled == nil {
		cs.Flags = nil
	}

	// Unassign the PowerOps field if all of its fields are empty.
	if ci.DefaultPowerOps.DefaultPowerOffType == "" &&
		ci.DefaultPowerOps.DefaultResetType == "" &&
		ci.DefaultPowerOps.DefaultSuspendType == "" &&
		ci.DefaultPowerOps.PowerOffType == "" &&
		ci.DefaultPowerOps.ResetType == "" &&
		ci.DefaultPowerOps.StandbyAction == "" &&
		ci.DefaultPowerOps.SuspendType == "" {
		cs.PowerOpInfo = nil
	}

	if l := len(ci.CpuFeatureMask); l > 0 {
		cs.CpuFeatureMask = make([]VirtualMachineCpuIdInfoSpec, l)
		for i := 0; i < l; i++ {
			cs.CpuFeatureMask[i] = VirtualMachineCpuIdInfoSpec{
				ArrayUpdateSpec: ArrayUpdateSpec{
					Operation: ArrayUpdateOperationAdd,
				},
				Info: &HostCpuIdInfo{
					Level:  ci.CpuFeatureMask[i].Level,
					Vendor: ci.CpuFeatureMask[i].Vendor,
					Eax:    ci.CpuFeatureMask[i].Eax,
					Ebx:    ci.CpuFeatureMask[i].Ebx,
					Ecx:    ci.CpuFeatureMask[i].Ecx,
					Edx:    ci.CpuFeatureMask[i].Edx,
				},
			}
		}
	}

	if l := len(ci.Hardware.Device); l > 0 {
		cs.DeviceChange = make([]BaseVirtualDeviceConfigSpec, l)
		for i := 0; i < l; i++ {
			cs.DeviceChange[i] = &VirtualDeviceConfigSpec{
				Operation:     VirtualDeviceConfigSpecOperationAdd,
				FileOperation: VirtualDeviceConfigSpecFileOperationCreate,
				Device:        ci.Hardware.Device[i],
				Profile:       nil,
				Backing:       nil,
				FilterSpec:    nil,
			}
		}
	}

	if ni := ci.NumaInfo; ni != nil {
		cs.VirtualNuma = &VirtualMachineVirtualNuma{
			CoresPerNumaNode:       ni.CoresPerNumaNode,
			ExposeVnumaOnCpuHotadd: ni.VnumaOnCpuHotaddExposed,
		}
	}

	if civa, ok := ci.VAppConfig.(*VmConfigInfo); ok {
		var csva VmConfigSpec

		csva.Eula = civa.Eula
		csva.InstallBootRequired = &civa.InstallBootRequired
		csva.InstallBootStopDelay = civa.InstallBootStopDelay

		ipAssignment := civa.IpAssignment
		csva.IpAssignment = &ipAssignment

		csva.OvfEnvironmentTransport = civa.OvfEnvironmentTransport
		for i := range civa.OvfSection {
			s := civa.OvfSection[i]
			csva.OvfSection = append(
				csva.OvfSection,
				VAppOvfSectionSpec{
					ArrayUpdateSpec: ArrayUpdateSpec{
						Operation: ArrayUpdateOperationAdd,
					},
					Info: &s,
				},
			)
		}

		for i := range civa.Product {
			p := civa.Product[i]
			csva.Product = append(
				csva.Product,
				VAppProductSpec{
					ArrayUpdateSpec: ArrayUpdateSpec{
						Operation: ArrayUpdateOperationAdd,
					},
					Info: &p,
				},
			)
		}

		for i := range civa.Property {
			p := civa.Property[i]
			csva.Property = append(
				csva.Property,
				VAppPropertySpec{
					ArrayUpdateSpec: ArrayUpdateSpec{
						Operation: ArrayUpdateOperationAdd,
					},
					Info: &p,
				},
			)
		}

		cs.VAppConfig = &csva
	}

	return cs
}

// ToString returns the string-ified version of the provided input value by
// first attempting to encode the value to JSON using the vimtype JSON encoder,
// and if that should fail, using the standard JSON encoder, and if that fails,
// returning the value formatted with Sprintf("%v").
//
// Please note, this function is not intended to replace marshaling the data
// to JSON using the normal workflows. This function is for when a string-ified
// version of the data is needed for things like logging.
func ToString(in AnyType) (s string) {
	if in == nil {
		return "null"
	}

	marshalWithSprintf := func() string {
		return fmt.Sprintf("%v", in)
	}

	defer func() {
		if err := recover(); err != nil {
			s = marshalWithSprintf()
		}
	}()

	rv := reflect.ValueOf(in)
	switch rv.Kind() {

	case reflect.Bool,
		reflect.Complex64, reflect.Complex128,
		reflect.Float32, reflect.Float64:

		return fmt.Sprintf("%v", in)

	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
		reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
		reflect.Uintptr:

		return fmt.Sprintf("%d", in)

	case reflect.String:
		return in.(string)

	case reflect.Interface, reflect.Pointer:
		if rv.IsZero() {
			return "null"
		}
		return ToString(rv.Elem().Interface())
	}

	marshalWithStdlibJSONEncoder := func() string {
		data, err := json.Marshal(in)
		if err != nil {
			return marshalWithSprintf()
		}
		return string(data)
	}

	defer func() {
		if err := recover(); err != nil {
			s = marshalWithStdlibJSONEncoder()
		}
	}()

	var w bytes.Buffer
	enc := NewJSONEncoder(&w)
	if err := enc.Encode(in); err != nil {
		return marshalWithStdlibJSONEncoder()
	}

	// Do not include the newline character added by the vimtype JSON encoder.
	return strings.TrimSuffix(w.String(), "\n")
}

func init() {
	// Known 6.5 issue where this event type is sent even though it is internal.
	// This workaround allows us to unmarshal and avoid NPEs.
	t["HostSubSpecificationUpdateEvent"] = reflect.TypeOf((*HostEvent)(nil)).Elem()
}
